Don't waste your time.
You don't want a cheap isolated, high output power brick- you want a good one.
I don't know of any with only two outlets, that are as small as the stock wall warts, or that cost much under $80 US.
Some people have had trouble mixing line 6, Strymon or Zoom digital gear with the Dunlop brick, so cheap ones off Amazon or eBay are definitely out.
Johno Dunn's y-cable or a 3-way plug adapter with the factory Line 6 and Zoom adapters are the way to go when you want small, simple and inexpensive.
Thanks. I have a small 3 way adaptor on its way. I think its a more elegant solution without spending a lot. While i dont mind paying out for a good one, it might seems a bit extravagant just for two units. I keep all my gear, other than cab and bass, in a decent sized laptop bag. The idea is not to have to use a larger one or a second bag. I can get a decent sized adaptor in there still so ill go that route for now.