I recently purchased a 1985 O'Day 28. Since I can't find a brand name or model number on the forward ports, and need to order screens, can someone help me? The screen frames are 10 1/2" X 4 1/4". It appears that screens for "Gray" ports can be ordered thru the O'Day Owners web site but not sure of the type or model number. Anyone know what ones fit my ports?