[g__day (Matthew)]

Diffraction staff's response:

we don't make the mechanical parts. That was done by Sirius Domes.
Other folks -any suggestions would be welcome!

Will see if anyone from Sirius Dome (who quit trading 3-4 years ago but then were planning to re-open) is contactable or can help.

Anyone know if they are still around or how to contact them - or who made their track rails?

Thanks, Matt