SIP Migmate spares (UK)

I'm using a SIP Migmate Pro 170DP Turbo for welding aluminium. I have the
proper Teflon liner in the (Euro) torch but I am getting faltering wire
feeding and occasional poor contact in the tip; looking at the wire, it's
got an embossed pattern on it from the feed roll which has a knurled groove
in the 0.8mm position (using 0.8mm wire). I would like to replace the feed
roll with a proper 'U' groove roll but the manual's spare parts list is a
joke (it simply shows a diagram with the larger items inside the welder) and
has no part numbers; anyone know if a proper parts list exists for the
Migmate, where I could buy a spare feed roll or if it's possible to fit
parts from another make (seeing as these are made in Italy in a factory that
makes at least 2 other brands of MIG)?
TIA, Martin.

--
martin<dot here>whybrow<at here>ntlworld<dot here>com


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