We don't often have SAM Splints, they do get expensive, having to constantly replace them. They are common around here, a lot of calls take crews "off the beaten path". Small, fits in a jump kit or in a jumpsuit pocket, etc.. It's almost as nice as the cravat, useful for darn near everything. If you don't mind the black & grey, buying them from a US Military contractor will save big bucks on the bulk cases.
My first choice in splinting is a padded board with a roll of Kerlix or two; the orange morrison splints work nice, and they are easy to clean. We don't have vacuum splints, the ER didn't understand how to remove it, and it was cut; two more were never returned from patients who were flown. There goes a whole set of them. I'm not fond of air splints at all, and a few ER docs will bitch about them being used, but it seems we can never "lose" them.. always find their way back. Probably have three or four kits of them stuffed under the bench.
Also quite fond of the FOX Splints, and the Ferno splints that are orange with the velcro straps, but again, they are usually stolen at the ER and never returned. Pillows are okay for lower leg & ankle injuries, in place of an air splint; or stabilize it w/ a sam, and put a box splint on it. Then of course we have the Adult & Pedi MAST for splinting, another item that always finds its way back home.