For those interested in picking up a throttle controller, I had a couple buddies pick them up from AliExpress for $55 plus shipping.
I've been leery of the site in the past, but their's came and work fine, plus I've ordered other things from the site that worked out just fine. And it has buyer protection. Delivery time is the downside, however.
They sell 6 different ones, depending on vehicle application. The one, in the link, with the 4A harness should be the one for our Legacy's (my buddies bought theirs for other makes).
I think I'll be picking up one here soon.