Bob,
There are a few other nice NVA available, which are closer to the OEM Fox spraybar diameter. The ST and a few others' spraybars are significantly larger diameter, which may cause some loss of power - if that is a consideration.
I like the OS and ENYA sets. ENYAs are a bit tricky to locate, but OSs are available from Tower. Either of these will most likely require some 'packing' to center the spraybar hole in the venturi. I use aluminum "backup washers' available for pop riveters: light, soft (easily drilled that last bit to fit smooth and snug), and thicker than brass or nickel plated common washers.
The Fox spraybar is around 0.125". ST is over 0.140". ENYA and OS are around 0.130". The stock Fox 35 venturi minimum diameter is a bit over 0.250", so a bigger spraybar can really restrict the flow. Yes, better 'fuel draw,' but if it cuts power too much, that's not a big help.
Prices are not out of line, either...