There are conversions for the ERJ135 / 145 according to Modstore.
https://www.modstore.aero/modificati...as_70__70__70_
but I wonder with CRJ beeing available and also cheap, if the cross section of the ERJ vs the CRJ (standing straight option) won't make VIP conversion of those ERJ's even harder.
Are maintenance / operating costs of the ERJ's significant lower?