The biggest source of iron in the BML recipe is actually the BABY CEREAL which is iron enriched for human babies.
I revised most of my GliderKids Staple recipes a few years ago to remove the baby cereal and increased the Wombaroo High Protein Supplement to replace it.
My GliderKids Leadbeaters still contains wheat germ and baby cereal but uses a human grade calcium supplement so you do not have a restriction on fruits and vegetables fed with it. The recipe does use the Herpivite vitamins since it does not contain Wombaroo High Protein Supplement as a vitamin source.
One of these might be an option for you if you want to look them over.
http://www.gliderkids-diet.com/Staple-Recipes.html
If you have not opened the RepCal products you may be able to return them.