You know "Pairs"? You like "Pairs"?
You're already tired of the one and only included block set?
Then these might be what you've been looking for!
Some - well, most of them - are harder to play than the
original but there are highscore killers as well.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                 3858   21892  17.6% -lh5- def9 Jul 29  1996 NewPBS's/Arrows1.PBS
[generic]                 3573   21892  16.3% -lh5- b659 Jul 27  1996 NewPBS's/CopperRings.PBS
[generic]                 3509   21892  16.0% -lh5- fdbd Aug 11  1996 NewPBS's/Ethnic1.PBS
[generic]                 1138   21892   5.2% -lh5- ae28 Jul 24  1996 NewPBS's/Geometry.PBS
[generic]                 5419   21892  24.8% -lh5- 3e3c Aug 11  1996 NewPBS's/MetalMadness.PBS
[generic]                 4600   21892  21.0% -lh5- 6537 Jul 13  1996 NewPBS's/Misc1.PBS
[generic]                 5737   21892  26.2% -lh5- 79f5 Jul 25  1996 NewPBS's/Misc2.PBS
[generic]                 2484   21892  11.3% -lh5- 91a3 Aug  8  1996 NewPBS's/Nations1.PBS
[generic]                 3707    8810  42.1% -lh5- 6ffc Oct 26  1996 NewPBS's/NewPBS's.guide
[generic]                  758    1611  47.1% -lh5- 5f91 Oct 26  1996 NewPBS's/NewPBS's.guide.info
[generic]                  700    1233  56.8% -lh5- 103a Oct 26  1996 NewPBS's.info
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total        11 files   35483  186790  19.0%            Oct 30  1996