I found an old Lockhart adapter and cooler on ebay. They come up from time to time on there. I dont think the Cycle x adapter allows using the original oil filter housing setup but I would not be afraid of using a good spin on oil filter with there adapter.
The spin on filter is supposed to filter better than the stock paper element also increases the oil capasity a bit witch can never hurt.
I also love the ease of spin off then spin on filter that cant b beat. They are the harley evo filter so you can buy in chrome or black