Thanks for the recommendation and link. I ended up ordering these Ultralink angled compression-type spades:

http://www.accomponents.com/11-30ULPSPADE.html

Price was $14.50 US per 2-pair pack, or $12.50 in quantities of 10 packs or more. Much cheaper than similar Monster angled spades.

I'll post again when I've confirmed that they fit.