I hate to get too creative (read: expensive) at the moment. When my wife and I left Miami a year ago we got rid of most our stuff. Now we're getting back on our feet and having to buy pretty much everything, which means money's limited right now. So the wife is gonna roll her eyes in irritation if I go buy a piece of wood to work on, especially while I'm simultaneously working on a bunch of other projects (one of which being getting my bloody PC running again, lol). Also we're in an apartment that we'll probably be in for no more than two years, maybe only a year.
I'll probably first see if I can drill out a toggle and make it compatible with the hooks. Otherwise, it looks like I can probably find hooks with machine screw threading (like the ones pictured above). The last ideas, while arguably better, and definitely more interesting, will be backup plans.