The Metris conversion is a rare bird, but if you give some additional info, we can probably narrow down the options for you.
What year was the Metris converted?
What SMB location did the conversion?
Is there a model number associated with the conversion (e.g. EB-50 is s typical Ford conversion model), or was it your own design?
SMB-less as of 02/04/2012. Our savings account is richer, but our adventures are poorer.