[Gurutronic (Ernie)]

I have a couple of issues with accessory screws for Celestron OTA's I am hoping someone can assist with:

I lost one of the black screws that attach the RDF to a Nexstar 6se OTA. Does anyone happen to know where I can get a replacement?

Also, I purchased a Stellarvue SCT shoe to mount a SV60 RACI finder to an Edge HD800, but the built in accessory screws on the OTA are too short to attach the shoe. Does anyone know where I can get some black screws that are the same thread as those supplied, but maybe 3-5mm longer?

I had a quick look in my local Bunnings but only found silver screws, nothing in black...

Thanks!