Eberle trailer wheel rims

Hi

I own an Eberle clamshell trailer. I have no spare wheel, and am
in search of one. I have visited at least four local tire shops where
I live (in Canada) with no luck. I know the trailers are of European
manufacture, and the bolt pattern may be metric. Canada uses the
metric system, but apparently rim suppliers here do not.

I purchased one rim, which I was assured would fit, but when I tried
it, the bolt pattern was too narrow by the smallest of margins.

Does anyone know of a source for such rims?

Thanks

Bob Leger - 'BL'