Howdy.
Um......I run a bit of Meade gear, LXD55, LX90, DSI's etc. I think you have a way too large scope on your mount. Where is your LXD75 OTA? What size is it? Why are you not using that? I really dont think it's gonna be at all stable enough for astrophotoggraphy. Not being offensive, just constructive critisism!!
Try York Optical in Sydney. Check out their web site. May be a part number Like SWRING-254 or something, if they can help you in that size. You may also need a dove tail.
Bintel may also be an option.
PS: check out the EQ6 Pro mounts while your shopping around.
