Very little Horslips stuff out there, and while in a previous life I had Happy to Meet and a few singles on vinyl, that was b4 I learned guitar, so I never got round to working out any of their stuff.
Best I can find trawlin' the web is:
http://www.guitar-chord-helper.com/s2825nm-dearg-doom-guitar-tabs.html
- a list of sites with Horslips stuff, but it's pretty much Dearg Doom, Furniture and sod all else.
If I find any more, I'll add another post to this thread.