One source of 14 inch wheels would be the 108 from 1966 to 1968. The hubcaps are different (the finials used those pointed stobs to hold the hubcaps, the 108's used embossed flanges to secure the hubcaps) but I think they will fit.

The last ones I saw on eBay went for $100 each. You would need five wheels to have a correct spare.

The early 108's also had the small hub caps withe optional chrome beauty rings so they don't miss the 110 look by much.

Can anyone speak to the fact of if they fit or not?