The Jubilator Activator can be obtained in Survival Mode in mostly the same ways as in the campaign, although it can be a bit tricky:
You can buy it from the Odds & Ends Shop (if offered)
You can also obtain it as loot from Dig Spots (Uncommon-Rare)
You should technically also be able to obtain it from an actual Jubilator by immobilizing it with a Shock Grenade, bashing open the hatch at the back and using the Extractor to extract the component. I am not sure if this is actually possible since I haven't seen any Jubilators in Survival Mode.
As for the Jolly Brolly, it is only obtainable if you pre-ordered the game and in that case you should have received a code which, when entered, will allow you to find it in the Pneumatic Stash.