This will get me "Cheapskate of the week" award !
In Lidl this week they were selling self-assembly pine foot stools. I have a large ten pointer Red skull I have been meaning to mount for some time The top of the '3-piece' stool is about a 500 x 250mm radiused rectangle. After a few stains with colron wood dye it looked old, the skull fitted perfectly. Also, the two ends will make some great smaller tapering plaques for Roe.
I put a piece of 2x2 in the skull cavity and fill around it with DIY filler (preferably one with resin in it) I then screw into the wood from the rear of the plaque.
Everyone who has seen it thought it was a purpose made plaque.
Three mounts for £2.99, that can't be bad.
Other European discount supermarkets are available !