Dear Gingyer,
I think it will probably be better for me to ring them in the end. I am currently waiting for two Co.'s to get back to me from their Websites (non model connected). Many Co.'s are very efficient of course, but some, whilst they have lovely 'all singing and dancing' Sites, only monitor sales enquiry emails from their Site every few weeks - this was actually said by a Co. last month.
The 3mm x 2mm brass mesh is exactly what I need and have been looking for. They show two entries with the same part no., and all I need to know is whether this is accidental or whether one is a different gauge/thickness from the other. My trial with the sieve mesh failed dismally, so I am looking forward to getting the proper stuff!
Regards, Bernard