As for the interior:
Try Eduards' PHOTO-ETCHED DETAIL kit, number 35390
Its an ACAV interior for a Tamiya M113 but i'm sure it can be kit bashed to work on anything.
It can be picked up for $16 here:
http://www.hometown-hobbies.com/inc/pdetail?v=1&pid=20760
and cross referanced on Eduras site here:
http://www.eduard.cz/products/card.php?id_product=1888&name=m-113&catalogue_nb=&type=&pgroup=&scale=&product_month=&product_year=&page_start=0
If you click on the instruction sheet link you can download the instructions and see exactly what the kit consists of.