i have lug centric spacers and so do many, many members. there is no problem with them. the sticklers like to advocate the hub centric ones. I have run mine for thousands of KMs (both on road and off) and had no problems whatsoever with them (besides the bearings wearing out really fast - but thats because they were due for replacing anyway).
As long as you install them correctly, Lugcentric spacers should not be a problem.
And yes, ebay