Yes those are upgradeable to the new £1. Just send them in to our address (below), along with your contact details, and return address.
Repairs
Micro Electronic Services Ltd
Unit 3 Admiralty Way
Camberley
Surrey
GU15 3DT
MES didn't make any of them we are not manufacturers, we are, however, a service center for manufacturers.
You won't be able to find MEI, as they merged with several other manufacturers a couple of years ago, and created CPI.
The prices are actually a little more than that, and depending on the exact coin mechanism range from £25 to £50
(Posted on behalf of Micro Electronic Services)