It doesn't hurt to ask about the creams and wipes. I decided not to full with them. I was just happy I was able to get the type of protection that works for me.
Look at
https://www.vendorportal.ecms.va.gov/NAC/MedSurg/List and see if the items can be order through the National Acquisition Center (CCST). Some of use have experience the issues you mention, but it depends on the pharmacy and their knowledge of how to do this.
I just checked for Abri type diapers and they are finally on there. So it might be worth looking. Last time I went through this I printed out all the information about the product I wanted the VA to send me.
Good luck with it. The more prepared with the type of items that work for you will make the doctors job easy at placing the request..