New Replacement Lamps Available for Aristo VCL4500 and VCL8100 Cold Light Heads
So is the new product announcement in this thread the type of thing you are looking for?
I know this is backward from the way you described how it should work, but I had already made the post in the Darkroom Equipment forum before 'Jerevan' responded that it might also fit here.
For the record, I have no business or financial stake in the named company. Only a desire to see them continue to reintroduce these replacement parts for the users of the now discontinued original units. Also, I am an owner of a used VCL4500, so this latest resurrection does positively impact me.