Many TR8 parts are now NOS but there are various replacements available that will do the job just as well if not better from Amazon and the like. Below are the alternatives I have found. If you have any suggestions please do let me know then others can benefit.
Rubber Caps
Around the engine bay are various now unblanked tubes ends of screws etc when the rubber caps that once covered them are now all long gone. These rubber caps in various sizes do the job really nicely and are available here https://amzn.to/3UT6WR0
Works well for the rubber covers on the plenum catches, the originals for which were blue.
Note the use to neatly cover the tops of the SPAX suspension adjusters
In line FUEL FILTERS for carb TR8’s
The ones supplied from Rimmers have an olive adapter to fit the original carb system but the inlet is very small so these are a great alternative.
One on the Right is the original style with a much smaller hole
plus you can easily see the state of the fuel. Available here https://amzn.to/3WZG0lg
Clear see through which is a great improvement
You need to do a small mod by using a small piece of copper pipe fitted to the original carb olive connection as shown here. That then means you have rubber fuel pipe at either side of the filter and thus no need for an olive connection anymore.
Note the copper pipe going to the carb olive connection thus converting both ends to pipe
The pipe I used can be obtained here https://amzn.to/3x0bgpx
And the fuel pipe if you need it https://amzn.to/3R0u3b2
And the correct curved fuel clips https://amzn.to/4bA1cCU