The Voices won.
I'm going to do the build as a blowback 9mm on a welded receiver. It will be much easier than .30 Carbine, and 9mm is much cheaper to shoot, plus I already load for it. And it will be <i>much</i> simpler and cheaper than .30 Carbine, which would require starting with a milled Galil receiver and making the cuts for the "Micro" shape used in the Magal...
revocable living trust: CHECK
Form 1: CHECK (mailed 12/10/2013)
Magal stock: CHECK
three Galil cut receivers from Apex: CHECK
Galil top cover: CHECK
The Magal's .30 Carbine magazine was slightly curved. I'm planning on using PPSh41 magazines, which look fairly close to the Magal magazine.
I'll have to build the gas block, bolt, mag latch, and some other bits; it shouldn't be that hard.
Since the receiver already has the cuts for the Galil safety, I'm planning to build my own Galil-style safety bits. A few people have gone that route, probably for the same reason I plan to - real Galil safety bits are disproportionately expensive.
The hard part will be the folding stock. There are several Galil stocks, and of course the Magal uses the rarest, most expensive one, where the folder bracketry is milled right into the back of the receiver. I may wind up faking it. Fortunately the stock itself won't be any problem; I've found pictures of Magals with every type of Galil stock. Same for the top covers, too; and some had Mepro optics and no rear sights.
The Magal's bayonet lug is a separate part, on the top of the barrel instead of underneath. It looks to be an ordinary SAR lug ($30 from Apex), except upside down. I haven't been able to find a picture of the Magal bayonet. If any bayonets were actually made, they would have had to be unique to the Magal, since the lug to muzzle spacing is much shorter than an ordinary Galil. I haven't found anything useful about the flashlight the Magal used, but I'll just fake that with an appropriate Maglite or something.
I'm not planning on starting the build until the Form 1 comes back, and those are reportedly backed up for more than a year. But as funding permits, I'll continue to acquire bits and toss them into the Magal box. Clear plastic sweater boxes from the dollar store are great for storing inactive projects...