An encouragingly high number of people have taken and interest in Mk1 cab mats since it started.
I have been talking with Jan Stretch of
http://www.carpets4.co.uk about fitted carpets for Mk1 cabs.
Jan reckons that from about £60 they could make a fitted carpet for a Mk1, and, I assume, for a Mk2.
Prices will obviously vary with the quality of carpet that you choose.
The next step forward I suppose would be for someone who lives near Lancaster to drop in with their Mk1 or Mk2 so that Jan, or whoever, could measure up.
Once a pattern is made, I expect you will be able to mail order fitted carpets for your Mk1 or Mk2.
Carpets are considered to be much better at sound deadening than the original rubber mats.
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