where can I find paper clips with the tip of the inside loop slightly
bent to provide better holding power?

The paper clips you?re referring to are called lipped paper clips.
Here is an image of these paper clips where you may verify that the
tip of the inside loop slightly bent.
http://www.cartmart.co.uk/acatalog/503298.jpg

CartMart Office Supplies carries these paper clips and will deliver
outside the UK.

Clipper Paper Clips Small lipped
Order here:
http://www.cartmart.co.uk/acatalog/Office_Supplies_Clipper_915.html


Shipping information:

They accept orders from outside the UK. 

We accept credit card payment. If you are shopping from North America
or anywhere else, place your order and your credit card company will
convert the transaction to US Dollars or your own currency.

Shipping And Handling 
DELIVERY CHARGE on all orders inside the UK - £7.99

Non-UK orders shipped by Fedex pro rata or by mail. Delivery charges
will apply. You will be emailed to confirm you accept delivery charges

Email: info@cartmart.co.uk

CARTMART Office Supplies
http://www.cartmart.co.uk/acatalog/info.html


Euroffice ? office supplies & stationery online also carries these
lipped paper clips, however they don?t ship outside the UK
Small Lipped Paper Clips Pkd 200
http://www.business-office-supplies.co.uk/small/small_lipped_paper/480751.htm

Purchase here:
http://www.euroffice.co.uk/itm_show.asp?G1431=Clipper-Paper-Clips


I searched for lipped paper clips and no tear paper clips in Froogle
without any luck.
http://froogle.google.com/

I searched Office Depot as well. Unfortunatley, they don?t carry these paper clips.
http://www.officedepot.com/


Search Criteria:

Paper clips
Paper blips bent
Lipped paper clips
No tear paper clips 


I hope you find this helpful! If anything is unclear with my answer,
please ask for clarification.

Best regards,
Bobbie7

Isn't that just a normal paper clip?  (It is in the U.S.)

Oh.  Sorry.  I should have looked closer.  Please ignore my stupidity.