Looking for Universal Outdoor PTZ Housing

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I have a really tight budget and it is nearly impossible to find the features I need in an outdoor PTZ camera within budget. I can easily get all of the features I need in an indoor model for a fraction of the cost possibly allowing for the purchase of an outdoor housing while staying within budget. Ultimately I need a 1.3-2MP PTZ with IR for night and under $600. IR distance isn't really a deciding factor but at least 10 meters would be nice, more if possible. I don't need a strong optical zoom which seems to be standard on all of the outdoor models I've seen. Could anyone suggest a camera and replacement housing or a universal housing? Any help is much appreciated.