I do not wish to compete with my friends who make military canvas products but I do make custom products for G503 M38, M38A1 that are not available from other suppliers. For standard MB summer tops, seats, e.tc., I recommend Dave Pizzoferrato and www.odcloth.com
I can make doors and side curtains for your current summer top but I do not make summer tops by themselves. I only make custom parts that you can not buy from other vendors. I can make olive drab canopy parts to fit over a roll bar or custom bows.