I will give to you another sugestion : if the oracle database in runing in 8i,
you can perform the command alter table move tablespace.
I did this test:

create table test (a varchar2(30))
tablespace td_users
pctfree 10
pctused 40
storage (initial 10k next 10k pctincrease 0);


ALTER TABLE TEST MOVE TABLESPACE TD_TOOLS
PCTFREE 5
pctused 50
storage (initial 20k next 50k pctincrease 10);

The results were okay!

After that, you can move the table back to td_users.

Good luck!