I have quite a lot of questions! 
Let me start by saying I bought my Saumur 30 second-hand. It was in good condition, nice patina, piping intact, no cracking, canvas perfect. It only had a pen mark on the strap and slight cut mark on the shoulder pad. I wore the bag to Greece and found my bag got very dehydrated from the extreme hot heats in June! Cracking began, I purchased apple leather conditioner but it has been getting worse since then.
I no longer wear the bag as I'd like to eventually change the vachetta as I'm afraid the crack will result in the entire strap breaking.
First question is in regards to getting vachetta replaced. Does anyone have price points on their vachetta replacement on the Saumur 30? I've seen prices from $300-$960 for Saumur 30, 35 and 43. If you have pictures that would be great too! Secondly, is it possible to get the vachetta replaced but using the same original brass hardware? I have read they change the hardware and use a non-brass material now ..
Now, when I change the vachetta, what are some methods I can use to prevent water marks and staining? I've read about using LMB (which has mixed reviews and darkens the vachetta, I have read about the Patina Champ method (good reviews, but OP says not to treat the bag, how will I prevent cracking?), and some people use various leather protectors like Kiwi (which are silicone based and over time can damage your bag more?)
Lastly, how do I prevent cracking? I've tried Apple Leather Conditioner but it did not help (maybe my bag was too far gone?). Should I just leave it be? Any other suggestions?
Sorry, I'm a newbie and this is my only LV bag that I have.

Let me start by saying I bought my Saumur 30 second-hand. It was in good condition, nice patina, piping intact, no cracking, canvas perfect. It only had a pen mark on the strap and slight cut mark on the shoulder pad. I wore the bag to Greece and found my bag got very dehydrated from the extreme hot heats in June! Cracking began, I purchased apple leather conditioner but it has been getting worse since then.
I no longer wear the bag as I'd like to eventually change the vachetta as I'm afraid the crack will result in the entire strap breaking.
First question is in regards to getting vachetta replaced. Does anyone have price points on their vachetta replacement on the Saumur 30? I've seen prices from $300-$960 for Saumur 30, 35 and 43. If you have pictures that would be great too! Secondly, is it possible to get the vachetta replaced but using the same original brass hardware? I have read they change the hardware and use a non-brass material now ..
Now, when I change the vachetta, what are some methods I can use to prevent water marks and staining? I've read about using LMB (which has mixed reviews and darkens the vachetta, I have read about the Patina Champ method (good reviews, but OP says not to treat the bag, how will I prevent cracking?), and some people use various leather protectors like Kiwi (which are silicone based and over time can damage your bag more?)
Lastly, how do I prevent cracking? I've tried Apple Leather Conditioner but it did not help (maybe my bag was too far gone?). Should I just leave it be? Any other suggestions?
Sorry, I'm a newbie and this is my only LV bag that I have.
