Wheels for my modified Dart 67

Hi!
Temporary I've bought these kind of wheels:
Front is 16 7JJ 5x114.3 ET 55 (with the 5 centimeters "spacers", piece of metal between disk and the wheel)
Back is 17 8,5JJ 5x114.3 ET 60 with the 245/40 R17 tyres (looks too low profile)

Struggling to find the set of wheels for my car - mainly there no such ET (55 or 60).

My thoughts:
1. Remove spacers from the front, in that case ET will be not 55 but 50 (ET 55 - 50mm spacer), will it look ok with such difference with the wheels on the back?
2. Rear - to make it not R17 but R16 as front, but try to keep the same width (wide ones looks cool). here comes the biggest trouble - I can't find the wheels that ET 60.

what solutions do I have? can you recommend me the way out? is there anybody who makes the custom sizing with the reasonable price?
thanks a lot in advance!

the design I would prefer is the following
hVN5015-1024x928.png
or
hVN5017-1024x908.png

Right now the car is on the customs exhaust system works :)

IMG_0940.jpg

IMG_0938.jpg