Won't know for sure until you see it, but maybe the WindTech 500 series sounds about right?
Inside Diameter: 0.437" (11 mm)
Inside Depth: 1.250" (32 mm)
Overall Height: 1.500" (38 mm)
Overall Diameter: 1.125" (29 mm)
Colors Available: 22
Fits the Following: AKG C410, C621, C921 Audio-Technica ATM35, ATM71, ATM75, MT853. MT857, MT858, Pro 8 Audix ADX-40/41, F90 Beyer SHM415, SHM20/21 Clear-Com CC-26, SMQ-1, DMQ-2 Crown CM30, CM31, CM150, LM300. DPA 4004, 4007, 4021, 4022, 4023, 4033, 4035, 4036, 4037, 4051, 4052, 4053 E.V. CP-212, (University 1700), HM2, PC12, PC18. Nady HM-1, HM-2 Peavey PM-16S, VCM-2 Telex PH-10, PH-16 Sennheiser e608, HMD 25-1 (headset), HMD 224 (headset). Shure Beta 98H/C, SM2, SM10A, SM11, SM12a, SM102, WH10, WH20, 512. Special Projects SP946, SP956. Most podium & headset style mics with up to a .625" diameter.
$5.50 at B&H, just choose your color, lol >
http://www.bhphotovideo.com/c/search?Ntt=windtech+500&N=0&InitialSearch=yesBtw, acidjack, what make of dead rats did you wind up going with for the 4021's and what is the make/model of the big DPA screens you use? Think I might have to go custom as none of the shops have been able to give me a definitive answer on dead rats for the standard screens on my DPA's or 414's.