Mfg's do quite a bit to bring a product to the market which usually includes market testing and I'm sure the testing that was involved with the Bronze from Timeless was no different. Why not seek out a local, to you, machinist to hollow out your handle for you? Were you expecting Timeless to pick up the expense for it? Your asking for a solution to a problem that they just don't see as having and maybe that is why you sense they have no interest in a solution. There first has to be a problem and I'm sure your request for a lighter handle is just not something that comes up very often or there would be another option available.... Not sure why its just such a big deal that they don't offer anything other than the handle they do!! There are plenty of specialized handles out there from other sources as you've found from the Russian Ebay market that could fill your need.I asked Timeless whether they could offer a lighter hollowed out handle in bronze but they weren't interested in the slightest. Very few manufacturers have any interest in this solution.
I know Shane at Blackbird has certainly had his share of criticism of the handles he offers for his razors but as most any other Mfg'r he has stuck to what he has designed and put through testing and knows what will work on his razors and stands firm in that aspect and it would seem Matt is the same way... Clearly neither are missing out on many sales because of their handles as sales are very strong for both of them!!