I miss some of the old Steinberg plugins too (Tonic) but the Massey VST bundle was the main reason I installed the 32 Bit Version of Nuendo. I've been opening those projects in 32bit and exporting whatever tracks use the plugs in question. Then opening and finishing in 64bit.
Bit of a hassle but worth it IMO.
Win7Pro 64Bit, i7 3770k, Gigabyte Z77-UHD5, 12gb Corsair (1600Mhz), Nuendo+Nek 6.07, Nuendo+Nek 5.5.6, Reaper 4.591, Studio One, Raydat, UAD X 2, UM-3EX, Glyph eSata Audio Drive, 6TB Storage, U-He ACE, Arturia Moog Modular & Jupiter8v, Korg Legacy (MS-20, MonoPoly, Wavestation), Portico 5043/5033.
AKG 414-B XLII (Matched Pair), AKG D 112, Neumann TLM-193, GrooveTubes GT-66, Shure SM-81 (Pair), Sennheiser e604 (3pack), SM-57 (Many), Beta SM-57, AT-3035, Many More, Panasonic DA-7, Event 20/20p, Alesis Monitor One, Philips MMS321 Multimedia Speakers, TLAudio, HHB, JoeMeek, dbx, Moog Model D, Nordlead 2, Korg MS2000, Triton Le, Boss Dr. Rhythm DR-55, Sound Gizmo, Acoustic Drum Kit, Fender Stratocaster (USA), Ibanez EXSeries Bass, Laney VC-30.