As already pointed out the MTH PFE wood reefer is freelanced. I'm hooked on the look of PFE reefer blocks and I'm always on the lookout for 3 rail cars with reasonable detail to convert to 2 rail. A scale dimensioned PFE reefer to consider is the Crown Models (now Weaver) wood sheathed reefer with steel roof and ends. It was modeled on the PFE R30-18 class - one of the interesting postwar rebuilds of older wood PFE reefers. With cast on ladders and grabs it lacks the level of detail now found in higher end 3 rail offerings.
For those looking for a highly detailed (albeit more fragile) PFE 40' wood reefer 40' consider the Red Caboose's R30-12-9. It was originally offered as a kit (similar to Intermountain in complexity) and later offered fully assembled. Weaver 3 rail trucks with NMRA spec bolster height would make them an easy conversion. They were offered in at least 3 PFE lettering schemes and in a dozen or so car numbers. They show up on eBay from time to time.
Ed Rappe