Can anyone recommend a source of model stone finials?

[C126]

Please can anyone recommend a source of ready-to-use model finials, to top off the parapets of my under-bridge, thus?

 

 

Scale is OO, width of parapets 2" (51mm.), depth 5/8".  Is there a specialist modelling supplier that makes coping stones or short finials for such scratch-building?

 

On a related matter, I hoped to obtain some onion-shaped fishing floats for the same purpose, for a planned Orientalist-style warehouse, without luck.  Did I imagine the shape from a friend's fishing expeditions forty years ago?  Has anyone else tried to sculpt an onion-shaped dome for architectural modelling?  A colleague (ex-professional model-maker) suggested using a bead and hand-forming from modelling clay the point.  I am hoping for a Brighton Royal Pavilion effect, thus:

 

https://en.wikipedia.org/wiki/Royal_Pavilion#/media/File:Brighton_royal_pavilion_Qmin.jpg

 

(The shape, not ornamentation, I hasten to add!)

 

Many thanks for any suggestions, and giving this your consideration.

[Edward]

I would try York Modelmaking and Brian Taylor at info@smartdesign-u-need.com>   at  Smart Models UK.

[Nick Holliday]

Scalelink do some nice capping stones with lots of relief, but mainly 8" square ones (6mm)

https://www.scalelink.co.uk/acatalog/Scenic___Scale_1_76__OO_.html

 

The brick piers look a bit tall.  I would have expected them to stop around the top of the girder.

[Gravy Train]

Langley models, Dart castings and as above, Scalelink or Das clay home made.