I would almost bet you that no one can fill and drill 5 holes where 4 once were
and be able to do so at a reasonable cost, while keeping the wheel centered.

Sell the old wheels and buy new ones. That way the new wheels will run true
instead of "egging" or "ovalling" as the tire rolls.

The alternative is to PAY to get the rims filled and drilled.
Be dissatisfied with the results.
Sell the old wheels and buy new ones....final analysis=pay more than if they
were not filled and drilled.

.....and it goes without saying that when you sell wheels that won't run
true, you will get a bad rap somewhere! ebay, paypal, etc or get the tar beat
out of you when the buyer gets his hands on you.