I have an original xr2 cowling - no tray.
I'm working away from home at the moment but will see if I can get someone to take some pics. There's a circular hole in the front of it but I think there is a square plastic cover with it that covers it. It's your atypical boxy xr2 cowl with red/yellow stripes and sort of vents. Pretty sure it'll be what you're after.
Give me a call and make me an offer - 07781 132232 -postage is going to be the biggest issue as I'm in Guernsey. Probably best to wait until someone is going to UK and to get them to bring it over - if you're interested I'm sure we can sort something out.