6" pyrex tubes?

well im hav ing slight heat issues with my 1k r unning so i picked up an other blower, this on eis 800cfm, i run a 400w mh for veg and the 1k in flowering.

i just recently built a new space to grow in, its roughly the same size as a c22 cab from homedepot.

i have 0 issues wihtthe 400 watter, but the 1k brings the room to 100* wich is way way to high. the blower keeps the exchange rate very very high, but its not killing i g uess the "radiant heat" from the bulb wich brings me to the next subject.....cooooooooool tubes

so i take my 4" bake around and set it up for the 1k lamp...should be good right?.....wrong.

i h ad to put a 6" to 4" reducer to make the 4" bake a round work, but.........reducing the 6" intake to 4" cut the 800cfm to about 400 cfm wich is def piss me off. Now with that said . i see 6" cool tu bes on the net for roughly 99-300 bux. i am really not tryint o spend that kinda money for one to be hohnest..so that bri ngs me to the million dollar question....were the hell can you find the 6" tubes without getting them from a hydro shop? :confused:

Hobby shop maybe?