Hey Ian
I totally get it, in my day job i am a Senior Technical Buyer at JLR Classic, so I source stuff like this every day, for me first port of call is to request price breaks, ie given price for 5 off, 10 off etc, but at a potential of £2.5k price tag makes this an unviable project, compared to a proven and cheaper product!
I am not hating btw and more than happy to assist in any wat
Rich