Here it is, 32 and 64 bit bundled together (DVD ISO):

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Found this over here: SP1 FINAL (oem partner download).. - Vista Forums

I tried this and it worked. All you do is create an account...then sign up for the newsletter. When you do it will pop up asking you to download the dvd iso

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CPU: Intel Core 2 Quad Q6600 | Motherboard: Abit IN9 32x MAX | Video: 2x BFG GeForce 7800 GT OC PCI-E SLI | RAM: (4x1Gb) 4GB Corsair XMS2 PC6400 4-4-4-12 @2T | PSU: OCZ GameXStream 600w | OS: Windows Vista Ultimate 64bit SP1