Ricoh MP C4503sp printer driver

MACBookPro Retina 13" 2014

OS: macOS Sierra 10.12.5

Printer: Ricoh MP C4503sp

Recently my company replayed the OLD Ricoh C3501 printer with new printer Ricoh MP C4503sp. But, the C4503 has no postscript module.

I tried to install the printer driver downloaded at Ricoh website and put the right passcode at the printing interface, but still can NOT print anything.

After below, I tried to install the previous C3501 drivers as below...

foomatic-rip-4.0.6.230.dmg

gplgs-8.71.dmg

pxlmono-1.9.dmg

but the gplgs-8.71.dmg installed failed.

Please advise where I can find right printer drivers for the C4503 printer.

Thank you.

Bill