Yeah, agree. A one stop shop would be ideal. I haven't found one that suits all my needs, but perhaps others have good suggestions and can lead us both to new sources.
As for the WireCare sale, looks like it may be on specific items (per the promo email that I didn't really look at until now, sorry). Anyway, they have types of braided sleeving that I haven't found elsewhere, so I haven't paid much attention to price competitiveness in the past.