We purchased a packet of 10 x 3 piece suction cup set from Solarscreen PO Box 8 Carina Qld 4152 Ph 0733985500. This company makes the solar screens for motorhome etc and the cost for a pack in Jan 14 was $10.91 plus postage to Sunshine Coast $9.00.
So with your vast experience with heavy machinery, military spec vehicles, sailing vessels, and sundry equipment, perhaps you could point me in the right direction as to where to purchase these items.
to the other respondents, thank you for your sensible replies.