I have, over the years, accumulated a number of spares.
Mainly eyecups and objective caps for Steiner but
also for other makes.

C Zeiss Jenoptem 8x30 22mm thread eyecups. £9.
C Zeiss Jenoptem 8x30 28mm thread eyecup. £9

C Zeiss Jenoptem and Dekarem 10x50 eyecup only 2 left £9
and the eyepiece that takes these cups £9

Zeiss West 10x40 eyecup £18

Zeiss West 8x30B eyecup £18

Zeiss West Dialyt 8x30 eyecup £18

Zeiss West 7x50 / 8x56 £18

C Zeiss Deltrintem 8x30 27.15mm thread £9

Zeiss 8x30 s/n 600000 1 eyecup 29mm thread £12. 

Steiner 7x50 all models upto 1991 one blue one green eyecup £12

Steiner 7x50 and 8x56 eyecups from 1992 3 x green 1x blue £12

Senator green eyecup 10x50 £12

Steiner all 10x50 models upto 1991 black eyecup. £12.

Rallye 10x50 from 1992 black eyecup £12

All 8x30 Steiner models upto 1991 without rubber armour
and 8x30 Firebird £12
.
One new eyecup for old Opticron Discoverer 10x42 £12.

Ross BinoPrism 7x50 eyecups £14

Hartmann Porlerim 8x40 Pair eyecups £18

Generic japanese hard eyecups thread 28.5 (approx)
with heights varying from 6.7 to 15mm £9

Steiner Navigator Pro and II 2 part battery cover  blue £16

Commander II compass light white £6

Commander III compass light orange £6

Commander Pilot battery cover black £12

Commander II battery cover green £12

Commander III battery cover blue £12

Commander EL battery cover blue £12

Rubber for press button Commander I, II, III blue £4

Centre axle for 7x50 £6

Centre axle for 8x30 £6

Swarovski Diana 7x42 pair eyecups £12

Helios Apollo 15x70 eyecups Pair £12

Steiner Skyhawk 10x42 part K0001650 blinkered eyecups £32

Barr & Stroud CF25 6x24 Front lens surrounds £8

Viking Visitron 8x42 rubber eyecups and twist-up sleeves Pair £24

Optolyth Royal 15x63 Pair eyecups £18

OS36 compass binocular 7x50 Pair eyecups £18