The 914 offset is ET40, & folks have used that style 8-spoke wheels on 914s since the start in`69, but there are about 2-3 or more makers now who make this style wheel, as both Minilite & Panasport & 1-2 other names/brands too - all having subtle differences in spoke size/shape, rim shape, weight, strength, etc.
Back then they were 14" or 15", but now they're available in 16" & 17" but you'll need to get the closest wheel & tire size & diameter using one of the tire size conversion calculators to minimize the speedo/odometer error in order to avoid "phantom mileage" on your car.
Last year or so, Classic Motorsports magazine did a great article on a wide range of repop classic wheels available today - including the VTO which Scott/sfrenk gave the link for above - so go to their website & look it up in their articles archives to read up. ..... very informative!
https://classicmotorsports.com/Good Luck!
Tom
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