Sorry, southernman. I wasn't realizing this was your thread. I started with an ACS stick mounted thumb. It comes with 2 tines, mounting plate, and cylinder for $4200. I bought 3 extra tines for $200 each. The round tubing through the tines close to the end was extra that I added as well. I have $5500 into mine, not counting time to build it. Your biggest expense is going to be adding auxiliary hydraulics if your hoe doesn't have it. I've never priced it, but I don't disagree that it might be $10,000. Post your serial number and maybe Nige could get you a part number to check on price.
Edit: I would not be afraid of buying one like I built and doing the work yourself. When we bought our 210, Case wanted over $9000 for a generic Werk-Brau, $12,000 to special order to match my bucket. Like other guys (including myself) say, a bucket pin mounted progressive link is the best, but sometimes you have to go with what works best for you.