The AC on the YJs was a bolt on which goes under the dash. This bolt-on unit houses all the AC controls . I know the heater control has a blue/cold temp control, but that is not related to the AC. Unless you have the vents/Evaporator housing as shown in the photo - I don't think you have AC in the rig.
The on off and temp controls are also on the unit. There is a fan (1,2,3 speed setting) and a snowflake knob for cold/coldest.
I could be wrong, but I personally don't know of any other AC set up.
As for hoses.... jeepair.com is the only place I found new ones. I picked up a set last year and it ran me about $130. I would not buy used ones as the ones that I took off my jeep were in pretty bad shape.
As for jeep air... they just ran a 20% off July fourth sale.... if you go that route - call them and see if they can still offer you that discount.