There's a kit on eBay for heated washer fluid (believe it may be from webasto). Just mount the unit under the bonnet, then run the power switch to your dash, and main power back to a spare fuse near the battery. You then tee off the washer line running to the front windscreen. It's easy to install.
As for the sprayers, I'd just pull the single center spray; and add two sprayers where the plugs are for lhd wipers. It's a great mod, and more than enough juice to cover the screen.