Amazon.com has all the different types of enema equipment you could ever dream of. Just go on amazon, search for "enema" and compare whatever looks appealing to you and read the reviews. There are even nozzles that can attach to your shower hose, but be careful with these- only use low water pressure and not too hot temp.
For example, a shower nozzle: http://www.amazon.com/Cleanstream-Wide-Shower-Enema-Nozzle/dp/B007KL44PO/ref=pd_sim_hpc_3
Shower hose: http://www.amazon.com/WaterChef-Premium-Handheld-Shower-Polished/dp/B00AQOCGH0/ref=sr_1_11?ie=UTF8&qid=1367766691&sr=8-11&keywords=waterchef (seems important that hose has silicone lining, not pvc)
I have only ever used the shower nozzle/shower hose combo, but in the future I may try this stainless steel bucket:
If I used the bucket, though, I would want to use an aluminum nozzle with it and this seems like it would work:
And you may want an IV stand to hang the bucket or bag from (I recommend researching on this site how high to hang the bag- the consensus seems to be to have the bottom of the bag/container no higher than 16 inches above your ass):
Good looking IV stand for enemas at the bottom of this page:
*disclaimer: I have no affiliation with any of these stores. Use caution and common sense with this equipment and use it at your own risk.