Hi and thanks for the Add Came across a bargain today so thought I would pass it on . Sometimes it's nice to pass on info about a bargain you find.. I wanted carry out inner bags for my triumph pannier set. I took a punt on some ebay versions and I'm over the moon with what I got for the price , the company is Great Bikers Gear and these are the 2 ebay links I used. https://www.ebay.co.uk/itm/pannier-...-/173686723332?_trksid=p2349624.m46890.l49292 https://www.ebay.co.uk/itm/Top-box-...-/172780303831?_trksid=p2349624.m46890.l49292 They Seem very decent for the money and have side and top entry zippers...you get a pair of 37 litre ones and separate link for the 42 litre box Hope it helps someone....
I have used these in the past when I had my first Tiger, I can confirm that they are excellent value for money and they fit the original panniers well.
I can recommend your idea with the inner bags. I am using the original Triumph bags, which are really cool and useful, but they are really "pricey"!!!