just offering these up for you ... they are seized, though you can buy a rebuild kit with elastomers and dust shields etc for about $60.
have not opened them up and prob. should toss'em but they are surprisingly lighter than expected.
if interested I will only charge shipping which you will...
Re:
not sure what your chimney is like, and may be off the track...but in the US there are differences in the flue for gas vs natural fire...lined? or diff. bricks?....not sure, but went from gas to natural flame with no worries as it started out as a natural flame fireplace.
this prob...
just about any 20" or so nice steel frame that has 1 1/8"
I think? yokota yosemite had 1 1/8 on the last years model before it went doa.
any park pre/yokota/brodie/muddy fox etc....not interested in trek/spec'ed but a giant atx steel would be nice!
thanks