focusing screen with rule of 3rds gridlines for 50d?

One thing I look forward to with my 50d is getting a focusing screen with a grid. I suppose the canon ef-d will do but I'd really like one with a rule of thirds style grid. I see katzeye has one but they want over $150 for theirs. I don't think I want it that much! Here is the grid for the canon ef-d:

Are there any others out there with rule of thirds grid that work reliably with the 40-50d?
best regards,
David
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The tolerance and understanding necessary to heal must come from each and every one of us, arising out of our everyday conduct until decency reaches a flood tide.
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