I haven't looked, but seems like you could shorten or lengthen the float arm on what you have and or bend it as necessary to reach the bottom and top of your new tank using the full range of motion of the sender.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-