I wish I had tried this when I had them. I used to just put a Daking Mic Pre One in the effects loop of the Eleven Rack and it made amp sims sound HUGE lol..I know it wont be "quite" the same but seems like every impulse out there is just cab/mic/DI or even commercial ones are typical Neve console'd and never trident flavored. I always liked that sound when you pushed the mic pre into the yellow a bit with varying hi pass settings. It literally made it so I didn't think I needed to double my tracks and was awesome in that respect. Seems like it'd be worth a shot at trying. Just capture the direct sound, then use it to spice up other impulses...