Motor plate - how to fix or get replacment?

[colmo]

I finally got to race my Madrat for the first time today, a long time after I acquired it on eBay in a job lot (thanks to mole2k for the rebuild!) at a rain-lashed Griffeen Park in Lucan, near Dublin.

It went really well, and seemed to suit my driving, until I took note that as I'd feared, the screws into the motor plate had pulled out, threadlock and all. One was lost.

I'm hoping to take this car to the Oople Invernational, so I either need a replacement or a repair/modification. I could re-tap the holes with epoxy (this worked with the front shock tower mount on a BJ4 I'm rebuilding), or acquire a new one before Thursday.

I'm also considering acquiring a spare kit for parts - this would have the problem-free motor plate and latest T-piece.

Any suggestions and/or sources for parts?

Edit: Just found the part number for the plate - 125000313 - £13.99 or thereabouts - makes the spare kit more attractive.