your furnace not gas force air?

interesting setup, your furnace not gas force air? why you need an air handler while can you adapt to furnace?

of course your technician wants to sale you a new unit...lol only money talks, everything else walks..

anyway, I am pretty sure you can find a air handler fits in your space, or worst case you can find a multiposition furnace, only use its blower to push cold air.

this is pic of a hard start kit, most HVAC place sells them, $15.