Addendum, January 2, 2013:
This car just popped up on eBay (assuming the chassis number is correct). For as long as the listing may last, see here: http://www.ebay.co.uk/itm/MGA-Twin-Cam-/110996266253




Notice in the final picture at left there are no holes in the front cross member for access to engine sump bolts. This is indication of one of the first 500 cars in production, which is consistent with the low chassis number. Wording from the eBay ad is below.

"MGA Twin Cam roadster, left hand drive, with the body and chassis fully rebuilt to top condition just waiting to be painted. VIN number 564, so one of the early cars. Some parts we are aware that are missing (there may be more): Instruments, Spare wheel, Expansion tank, Wiper motor and mechanism, Door and boot lid locks, Distributor, Pedal box, Heater. Comes with french registration. Car can be seen 5 minutes from Vigo airport in Spain. A deposit of 1500 GBP via Paypal it's required in the next 24 hours after the end of the auction. Buyer must arrange collection".

There must be a large bucket of bolts either hiding or missing. French registration is consistent with prior knowledge. Assuming this is the real 564 (the 64th production Twin Cam and Paris Motor Show car), it is a wonderful find. Additional photos below. The metal plate is missing from the engine, according to the seller.


Addendum, October 16, 2022: Up for sale again,this time on Bring-a-Triler.com after "refurbshiment". This appears to be pretty much full restoration for lots of money (too much money), but on auction with no reserve. For as long as the listing lasts see here:
https://bringatrailer.com/listing/1958-mg-mga-twin-cam-7

One feature in the pictures is a pair of 6 stud cam covers on the engine during restoration but absent on the final offering. I’ve never seen these before but EX181 has something similar that could have been from the same casting.