Well that was a good lesson in getting what you pay for...
the ebay seller I got the bullbar from ceased selling them due to low volume sales, and cut ties with the supplier, so can't source a mounting kit for me, they did offer a partial refund, which is as much as I'd expect considering I've made extensive modifications to it.
So, my options now are to contact the handfull of other ebay sellers that stock the same bar, to try and purchase a standalone mounting kit...
OR
Buy the same bar all over again, just for the mounts, bringing the total cost to a little over $1k, minus my refund...
OR
get custom mounts made...
OR
Buy and modify a similar design cheap bar from a known brand, ie: Ironman, Roo Systems, etc.
OR
Cut my losses and save my pennies for a quality bar, it is the only big ticket item left in my 'need' list, all the other expensive stuff is in the 'want' list
So I've got some thinking to do.