8x16 et11 is a little too much poke on front of a w123.
Finding less poke won't be easy in Pentas. You might have more luck in 15 than 16 inch because there seem to be a lot of 7x15 et21-25
If you want 16", mesh is the easy answer.
7x16 et21-24 is a more desirable fit for the front.
Make anything you want in bbs rs, or find a staggered set of one piece. I have a staggered set of Fondmetal weaves I have no intention of selling, and several sets in 8x16 et11: Taiwan ats copies (of exactly what you are requesting), rial weaves, bbs rs. But nothing in exactly what you are requesting.
I have a set of bbs rs that in stock form are 7x16 et35, but would be ideal for a full fit in the rear with 3" lips and 9x16 et10. On the front you would probably want 2" lips for 8x16 et22. Someone has "spoken" for the wheels with no deposit, but tomorrow I test fit them on a 560sl to see what it will take to make them fit. If it is a no-go, they are certainly for sale again. They are currently setup as 7x16 et35 (1" lips) and 7.5x16 et28 (1.5" lips) and selling as a project set under $1000. I offered to finish the job on them And assemble them for $1200, but the buyer opted for them in project-state. There is someone in ebay selling 2.5" lips for only $160 each on ebay right now, which sounds like a great deal to me. So for about $1600 you could do 8.5x16 et16 on the back wheels and 7.5x16 et28 on the front. Probably a lot more than you were looking to spend, but an option for some very nice (and marketable) wheels.
Of course if you want the Pentas in 8x16 et11 on all four corners, I could do them for less than the bbs rs config suggested above. They have never been mounted, so they don't come cheap, especially for copies.
If you find a set of 8x16 et11 bbs ra, of course I would trade you two for two of my 7x16 et23.
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