Trumpet Bottom Valve Cap Replacement

Friend has been restoring two trumpets but does not have access to any bottom valve caps that fit the custom threading. This model came about as a request for a pseudo-permanent fix. As there are no similar models I can find for this part, I thought it best to share files in case anyone else needs a quick replacement. 

Design utilizes TPU for press fitting over the existing threads and to hold onto the unthreaded portion of the valve. This allows it to comfortably rest in place without concern of it getting knocked off. Standard measurements provided below, but slicer scaling and STEP file modification are options if it doesn't match your horn. (I haven't really worked with STEP files for anything other than waterjets, so please let me know if there are any tweaks you need from the file!) 

Size: 

Outer Diameter: 19.6mm 

Inner Diameter (On threads): 18.4mm 

Inner Diameter (Above threads): 16.4mm 

Height (Not including base): 4.9mm 

Base: 1.05mm 

Height of Unthreaded Diameter Portion: 0.5mm 

Materials List: 

1x Trumpet Bottom Valve Cap (~0.5g)