I hope someone can help.

I need to get a replacement ash box and 'grill' for a coal fire.

The details on the 'grill' a

Baxi Patent Fire
Patent No. 708117
16 [written on the underside of each half of the 'grill']
L-STD-2-8
R-STD-2-8

I've tried to do a search on the web, but can't find anything. The
company using the Baxi name doesn't seem to have anything to do with
coal fires.

The house which has the fire is about 100 years old, and the fire
doesn't look like a recent addition, i.e. I think the fire is also 100
years old. The fire doesn't have a back boiler or any other 'extras'
added.

Thanks in advance.