*Original* Old macs were a good shape. Unfortunately the G2s and the entire Easyboot range now & just about every other type you can get, with the exception of wide Gloves, is more suited to a narrower foot
. I definitely wouldn't bother with Boas unless perhaps your horse has a particularly upright, high heeled hoof confo.
So I think the wide Gloves would be a goer. If you've been following other boot threads, you will know that the actual Gloves are only really suitable for good, non-flared hooves that are a near perfect fit, as they have no fastening system. *However, as they now come with the Trail uppers - named 'Back Country Gloves' - this makes them a more 'general purpose' boot that is also suitable for more 'average' feet. **Be aware that the fit kit only includes the shells, so you can't actually ride in them.
Otherwise, as Renegades can be cut back, these are probably the only other readily available option for wider feet. Pity they aren't made in more size options, but the 'w' & 'ww' indicate extra width.