1957 Power brake booster

I need a power brake booster for my 57 Skyliner and cannot find either a rebuild kit or a rebuilt booster listed anywhere. The Bird Nest (www.tbirdparts.com) lists a 58-60 Thunderbird rebuilt under dash power brake booster. From the picture it looks the same. Does any one know whether they are interchangeable? Thanking you in advance for a reply.

I found my answer from the Bird Nest. Except for the mounting bracket they are exactly the same. They will rebuild the 57 58 Ford boosters.