You can produce CFLM with CRAY. I assume you know how to make CRAY lasers and such, but if not, I'll just explain anyway. Basically, you get some CRAY, I usually go for one pixel of it, then some metal next to it. When SPRKed, it fires in the opposite direction to the SPRK, so adding some INSL to the sides of it to prevent diagonal lines is probably preferable. Set the CTYPE of the CRAY to CFLM and then the range to whatever you prefer, ideally make sure that the TMP number translates to a number of pixels within the VIBR's containment chamber. You could then probably design a mechanism to feed electricity produced from the VIBR directly into the CRAY laser to cool it.

As far as I know, you can turn ANAR and C-5 to CFLM, but I think in relation to ANAR, you would need some CFLM to kick the reaction off. You could produce CFLM alternatively by creating molten CFLM with the ctype command and LAVA, then designing an apparatus as part of the reactor that cools the LAVA down with PSCN-SPRKed ARAY lasers until it becomes CFLM, though I recommend designing a cartridge system, perhaps, so you can have pre-made canisters of molten CFLM to feed into the reactor.

Hope this helps you out with your reactor.