Looking to buy Tektronix 661 plug-ins


Hi , I am wanting to find a couple of old Tektronix plug-ins . They are from the rather old 661 sampling oscilloscope . I need a 4S2A and also a 4S3 plugin to complete my system :- please note that I am not asking for these to be working plug-ins , all I ask is that they are as complete as possible - the 4S3 does not need to have the P6038 probes although they would be most welcome also . Any other plug-ins for this oscilloscope will be considered as possible backup and spares . I would be very pleased to hear from anyone wishing to part with these .
Many thanks in advance .
Brian (UK)

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