Where can I find a list of passive probe accessories such as surface mount interconnects+ circuit board test points+ and replacement parts?

The accessories will depend upon which type of passive probe. There are three probe diameters: 2.5 mm, 3.5 mm, and 5 mm. The part numbers and a diagram of the accessories for each type can be found below:

2.5 mm (subminiature) probe accessories for P6130, P6131, P6133, P6134, P6135, P6136, P6230, P6231 Accessories => http://www2.tek.com/cmswpt/psdetails.lotr?ct=PS&cs=psu&ci=13723&lc=EN

3.5 mm (Compact) Probe Accessories for P6053C, P6133 Opt. 25, P6134C, P6135A, P6136 Opt. 25, P6137, P6138, P6138A, P6139A, P6339A, P6156, P6158 and P5050 Accessories => http://www2.tek.com/cmswpt/psdetails.lotr?ct=PS&ci=13522&cs=psu&lc=EN

5 mm (miniature) Probe Accessories for P3010, P6048, P6053, P6053B, P6055, P6056, P6057, P6062B, P6063B, P61XX/A Family, P612X Family, P61XXB Family, P6202A with Adapter, P6203, P6204, P6205 and P6206 Accessories => http://www2.tek.com/cmswpt/psdetails.lotr?ct=PS&ci=13523&cs=psu&lc=EN

Replacement parts can be found at http://www2.tek.com/cmswpt/psdetails.lotr?ct=PS&ci=13520&cs=psu&lc=EN.