Can only echo above, stay well clear of a paddle clutch, twin plates will easily do 500+ if you need to go that far.
Excede or competition clutch rated to the right level will be fine.
whoops lol
In all seriousness, it might be worth just ditching the whole alarm system and getting a new cat 1 fitted, you can get them as low as £300, sack the immobilizer and then can get simple metal keys cut for peanuts.
In case you don't know there's a website called humble bundle. They sell packs of games discounted and the money goes to charity, well worth a look cos you can pick up some bargins. It's fully legit and typicly the stuff is redeemed through steam (used it fair few times myself)
Additionaly now and then they give out free games,
https://www.humblebundle.com/store/the-bureau-xcom-declassified?linkID=&mcID=102:5a1f4eaad6ab4e4d7c79b4f9:ot:56e301ae733462ca897cd1f5:1&utm_source=Humble+Bundle+Newsletter&utm_medium=email&utm_campaign=2017_11_30_thebureau_xcomdeclassified_storefront&utm_content=Banner
so dip yer bread :D