Before ordering just check one thing. I assume the problem is that you are unable to wind the focus in enough? If it is just out of reach you can try unwinding the collimation knobs to move the primary mirror up the tube or even replace the knobs and springs with longer ones.
Another option is eyepiece projection. Bintel have an EP for this job see
http://www.bintel.com.au/Eyepieces-a...2/catmenu.aspx
Malcolm