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For a man of considerable engineering knowledge you surprise me!
@villa-ru Lasermaster or Laser24 (there are loads more but that’s who I generally use) could cut you one for £20 or £30, depending on how generous they’re being with their minimum order.
You might be able to send them a hand drawn sketch, but if you PM me a dimensioned drawing I’ll make a DXF (digital line drawing they work from) for you.
If you size the screw holes right (just smaller than the head of a countersunk screw) you probably won’t have to countersink them.
dbr-
you surprise me!
I'd rather people were pleasantly surprised by the price quoted in real life than the other way around.
There are shops who will do stuff for surprisingly small fees, but first you have to find them.
"get a replica made" and "make a functional replacement from CAD files prepared for nothing by a friend" are two different things 🙂
gbj_tester
There is, but you might not want to pay for it. There are several ways to cut that out from sheet stock, and if you wanted hundreds of them then they would be cheap. If you just want one, get ready to pay £100 or get your drills and files out and make it yourself.
Oddly, carbon fibre might be the cheapest way to get somebody else to make it, as https://www.fibre-lyte.co.uk/ are ready, willing and able to make one-off flat parts, usually for less than generalist metalworking shops charge.