Best way to produce 10-20 fake arms?

I was hoping to create some arms so that i could have them coming through my mock boarded up window this coming HALLOWEEN , and last year i needed a set of arms for a mannequin i made for a prop so i decided to use the method i used for the mannequin for this years prop and would try and repeat the process from last year but for multiple arms this method was to create my own again , the hardest part i found was the actual hands and so tried to find some cheap good quality hands because i didn't have the time to create or make any last Halloween , i bought a set of fake cut off hands off e - bay from CHINA inc postage for £7 UK pounds one left hand one right which is around $11 - $12 , they still sell them on U.K. e-bay and they were pre painted like the ones you find in Halloween stores , you probably can get them so much cheaper in the states anyway but over here we struggle to get this basic stuff , i cut them around the wrist area and fitted it with a couple of screws and duct tape to an old broom handle which i had cut into two pieces roughly the size of my upper arm and lower arm and used a basic piece of strong string to attach at what would be the elbow , you could of course adapt some kind of hinge or mechanism if you wanted more control or rigidity in your prop arm but i thought the basic idea it may help you , i then put a little padding around the broom handle not too much as i wanted it to look thin and boney under the shirt i was using for the dummy , it really worked and could maybe be a basis for your project with your need for multiple zombie arms, especially if you want arms facing different ways for realism .
I hope this helps , if you want more detail let me know and i will try to supply it , i think i have a couple of pics also i have used white plastic plumbing pipe before for lighter projects where wood is too heavy , and of course its cheaper as well i think i have a photo here somewhere if i have i will link it at the end of this post . not sure what you could use for the clinging effect at the moment will try and think of some ideas . could not find the wood/hand photos but found my zombie prop which used the plastic pipe idea for arms , see what you think , with the nightdress on looked realistic , especially in the dark ..... lol