Most of the rubber on the new to me 907IE is in good shape. BUT the oil pressure switch boot fell apart when I went to remove it to get to the starter. I saw a boot that looked about right on eBay, and it fits the switch perfectly. The only hassle is fitting the connector through the boot's wire opening. I stretched out the opening, removed the plastic housing on the connector and managed to work the connector through the opening, but not without a fair amount of struggling and potential for damaging the boot. It would be best to replace the 90 degree female spade connector (16-22 gauge) which are readily available.

A small victory in dealing NLA parts.

Google TRIUMPH OIL PRESSURE SWITCH RUBBER BOOT COVER 71-2930

ya gotta think sideways when on the hunt for parts. I'm willing to bet that there are thousands of different vehicles with that part on them......just gotta find it. When I'm on the prowl I look for stuff on bikes ,cars ,trucks ,bulldozers ,boats. .I got my one of them off a 7 pin plug that connects my trailer to the the car lighting.....came with a black eurethane rubber boot. An auto electric repair shop should be able to supply rubber boots