Canada had towed 155 guns from the 1950's until about 10-15 yrs ago. I remember seeing parts at a surplus yard in Beloeuil, Quebec. The owner of (
http://www.prefair.ca/products/?s=432 ) Jean-Baptiste ????? was buying surplus by the truckload from the supply depot in Montreal. Who knows if anything from the 105mm C1 howitzers have been sold. The only complication asking Jean-Baptiste anything, is he only speaks French. But money talks the universal language.
About 3 yrs ago, I bought 3 dozen .22 LR storage chests from him - really rotten and punky. He might remember me loading onto the roof of my family car (don't tell the Residential Sergeant Major).
(I just changed the url from the old store name to the new name.)