Not sure about your reference to a chain whip. I haven't mentioned taking one and I don't believe anyone else has either or I missed the reference. Are you referring to the J.A. Stein Mini Cassette Lock? It weighs in at a 31 grams. If you have a smarter solution for removing broken drive side spokes then I am all ears or should that be eyes?
I have a Unior 1659 which is indeed smaller and lighter. it's about 3/4 the way down this page:
I bought a few from somewhere in the US about 3 years back. I sold one to a mate at work and haven't seen the others since we shifted house recently. By the way, Unior make great quality bike tools in general, in amongst a much wider range. A bit more solidly built than Park if you ever have the option.