Regarding the VHB, I'm looking at a 6mm wide 33m roll option of the same 5952 tape at Amazon for £46.55, Viking Tapes also have these at a similar price once VAT is included.
Tom
@2work, do you have a measurement of the distance from the edge of the footrest to the end of the cutouts? If we could use two 6mm strips cut to length down the long edges, would this not be sufficient to hold the footrest down? It would certainly be the easiest option to apply to a big batch for postage, and would also allow full drainage of any water coming off the sole of the driver's shoe, down towards the carpet/mat as normal.
Two rolls would definitely cover all 93 units. At their current price on Amazon that works out at almost exactly £1 per unit, although by my maths you'd actually get 50-55 units from a roll. If you wanted to divide it up more precisely, the Shop could purchase the unused part roll for use against a future small replenishment order.