Certainly check eBay (carefully) for both. Many, many of the paper roubles and copper/silver coins of that era are common. As always, condition (for a collector) is paramount, excepting rarity. If you are willing, however, to accept either of these forms of currency in just "keep-sake"/association fashion, then you should not have much trouble. Also check with reputable dealers nearby and periodic coin/currency shows. Perhaps a local coin club could put you on the trail. Good luck! AP