Wanted: Atlas HO Master/Classic Series GP40 Shells (Low Nose)

I'm looking for 3 Atlas HO Master or Classic Series (current production, not old Roco - current ConCor production) low nose GP40 complete shells, including handrails, grabs and detail parts. I would prefer undec, NYC or CB&Q shells, but any other road name would be fine also. Looking to purchase outright, or, I have two brand new Atlas HO Master/Classic Series GP38 hi nose and one GP40 hi nose undecorated shells, including handrails, grabs and detail parts, available for trade. Thanks in advance for any help with this. Jeff