My wife has over a dozen of these timers at her golf course and at least half of the covers are damaged or missing.
This has been identified as a safety problem in a safety evaluation. Employees are expected to be moving those trippers when the schedules change and all the manufacturer's guards are not in place. This is the kind of thing that makes a workman's comp attorney's nipples get hard. I find it hard to believe these are not sold everywhere although we seem split between "problem" and "no big deal" here. I will try the phone number but that really sounds like a quality control line for new in the box products missing parts, not a replacement parts line.
