There is a double din binnacle for the older dobbie & a thread does exist.
The binnacle is very pricey though.
I did try to persuade my local 3d print shop to have a go but they said they couldn't do it without loads of techie specs.
The whole 3d printing thing does seem over complicated though - I thought you could simply scan a pic & add dimensions and away it went, but no. I was hoping to be able to tell it to print something an inch wider and double the height (simply make the top & back wider & the sides deeper) but it's not as easy as that.
So I left the shop & the printer to continue making naff looking keyfobs.