I'm not trying to kill a sale for anyone here but look into crawfordperformance, they have 224 at 7.2v servo's for $20, i ran one on my blazer for a while and they do great.
but then again, you can get 2 995mg's for $22 shipped off ebay and have and extra, and they are like 208 at 6v.
heres the link to the crawford one. http://www.crawfordperformanceengineering.com/product_info.php?products_id=18