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To set the sort order in the filter you would need to set the Default Sort Order for the dimension. Right click on the dimension name in the Dimensions list, Default Properties - Sort. However I don't think you'll be able to tell it to sort by another field, it'll be a manual sort, which appears painful in your case.
Another option would be to combine your sort field and the dimension - e.g. STR([Option 2 Number Sorting]) + [Product Name] - to create field to use as a filter. It would have values 1 Imation... , 2 Verbatim... , etc. I haven't tested but hopefully that would sort correctly, tableau would be smart enough to realise they all started with numbers.