All Chevy 16" were 6 lug & when the 15" came out they concluded that they dont need 6 lugs, so theey invented 5 lug. Hence, there are no Chevy 5 lug 16" rims.
There is a relatively late model Chevy truck wheel that is 16x5 with "normal" looking center with a 5" bolt circle. It's a riveted wheel ***embly. The center diameter is the same as '40-'48 Ford. I bought 4 of the Chevy truck rims off eBay a year or so ago and put 5 on 5-1/2' Ford centers in them. I don't have a clue what they came on. Charlie
My OT late '80s Blazer (small series) has a 16" spare wheel, 5 on 4 3/4". Should be able to get the do-nut spares pretty cheap at the junk yard.
Chevy S10 Xtreme trucks or any S10 2WD with the ZQ8 option came with the 16" x 4.75 spare tire, smooth center with single bolt pattern.
The Cheap 49 and 50 Bussness mans coupe came with 16 inch wheels 4 3/4 circle 5 lug and 4 and half inches wide.. Also was used on export cars 49/50 years. Very rare as every one threw them away and installed 15 inch as the tires were cheaper and easy to find after 1955 or so. I have only seen 2 or 3 sets or combos of these wheels. Ford Motor Co also did the same thing on their 50/51 buss cpe with a 4 1/2 circle..
rally america might know of another brand that will match? but as stated you can always just buy them new.