no such thing as far as I know in Canada; and if available. you'll be spending ALOT of money.
I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.
latest addition as of 2013-Gold 87-325is auto! it's a keeper!
There's a way to fab one up using your existing wiper linkage.
Other than that, Bonrath and AC Schnitzer both made kits that are both very expensive.
I believe AKG Motorsports sells the Bonrath system.