Who makes a Early-A Narrow Aftermarket K-member

I would try Hemi Denny right here on FABO or just Google HDK front ends. I use one of his K frames under my 6.1 Hemi in a 72 Demon. Saved me literally days of toil and trouble. His quality and customer service are excellent. He answers his own phone! Not saying Gerst or QA1 are not worthy but Denny is on here and has a wealth of folks using his products in this forum. He walks what he talks.