Found this out earlier today on 1/87 scale vehicles site that Walthers has reissued some of the former Boley line under the name Scenemasters. So far fire apparatus wise they have the International 4300 ambulance and crew cab engine, both in solid red. Here's the link: http://www.1-87vehicles.org/New%20Products/walthers_scenemaster_announce_20120310.php
The April sale flier for Walthers shows 19 vehicles with 1 fire engine and one ambulance. The others are a dump truck, box trucks School bus, Tractors, and a tow truck. Prices range from $10 to $15 dollars.