try something like this ( I am sure it's possible to find it locally from time to time):
http://www.ebay.com.au/itm/Mirror-le...item2c669f5503
I have one of those (30 years or more) and it's pretty good for what'its worth.
See here:
http://www.iceinspace.com.au/forum/s...&highlight=MTO
Another option may be one of those:
http://northgroup.en.made-in-china.c...Telescope.html
You can contact Gilman of Northgroup directly for pricing (he will sell you OTA only)
North Group-Gilman <gilman@northgroup.cn>