Solar on thick foam roof- exterior mounting beam? – GreenBuildingAdvisor

I am exploring solar options, though my roof is not the typical that solar installers are interested in:

– Roof structure, bottom up: Single slope shed roof, very low 0.72:12 pitch, 4×10” rafters 48” OC

– Roof deck: 2×6” T&G with 1/2” plywood on top, then old SBS roofing

– Insulation above old roofing: 7.8” of rigid polyiso followed by 1/2” polyiso HD coverboard (100 psi)

– Top membrane: Sika Sarnafil G410 adhered PVC membrane

– Total roof thickness to top of rafters: 10.3”

I am not interested in putting 200+ penetrations through the membrane for OMG roofing power grip 7 bases which was my first plan:

https://www.omgroofing.com/products/powergrip-universal-7/

I am wondering if anyone has ever seen or used a product such as a “beam” that I can run on top of the foam and membrane, directly over/collinear to the 48” OC rafters so I can seal and screw directly through the entire roof assembly into the rafters below (we are talking 12”+ screw length). Then attach solar racking perpendicular to these “beams” at whatever desired spacing I choose