From the photos I've seen the Wiesel 2 ambulance is the same as the UF/BF sans the MG3 , smoke grenade launchers (?) and a couple antennae, and add red crosses and a jerry can holder on the rear. . (I'd imagine with the size, the inside is pretty basic, "grab and go" kinda set up) That sound about right?

Wiesel 2 MEV is available form PSM.

https://www.perfect-scale.de/de/www-perfect-scale-de-3/Wiesel-SAN-Trp.html

I've seen that. Unfortunately it cost near as much as the other 5 Wiesels I have combined. Seeing I'm doing it buttoned up I think the RoG UF/BF from the Flak set will do the job. If that PSM kit is accurate the photos will come in handy.

You can check out Wiesel 2 San Trupp yourself.

http://www.primeportal.net/apc/dieter_krause/wiesel_2_santrp/index.php?Page=1

The superstructure of the San Trupp differs significantly from the BF/UF. It requires some scratchbuildinmg skill to make a San Trupp. For good reason, PSM made a new hull for the RoG suspension parts.