Small, low-cost laser range finder with RS232 interface

There are many low cost (< $300) laser range finders on the market but I could not find one that can be interfaced to a computer.
Do you know any small and low cost (< $300), laser range finder with RS232 (or RS422, USB etc) interface which can provide approx 5-10 measurements per second ?
Thx
Miem
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