Bob,
I just checked the
ebay site, and it looks like you could do the conversion for less than $75.
Just be sure you read the fine print, before you commit.
A lot of sellers are passing low quality Halogen bulbs off as HID.
You need to look carefully for a complete kit.
Also watch the shipping cost...some sellers shoot you a low ball price, and then charge you outrageous shipping charges.
This is to get around the tariff
ebay charges on the selling price.
Apparently it works.