Just contact Sover Wong. He'll sell you the correct cap without having to go through eBay and having to wait for something to arrive from the states.
APUG: F5, F4s, F3P, F2ASx2, F
Nikkors: 18-70/3.5-4.5G AF-S DX (f/D200), 35/2 O, 50/1.4 AI, 50/1.4 S, 50/1.8 AF, 50/2 H, 85/1.8 K, 105/4 Micro AIS
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