Hands down the best replacement housing you can buy is an E-code
Cibie.
The housing with the park light you want is -
7-HCRA 7" "E-code" Halogen Low / High Beam Cibie H4 with European Parking Lamp. I have been running a set in my 59 VW truck for 15 years. I run 55/60
watt bulbs. The only thing I did was add relays and made sure the grounds were good . The improvment is is night and day.
Hella makes a decent unit too
