remembering multiple currval() inside a RULE

Hi list,

I need to setup a RULE for INSERTing into a VIEW.
The rule has to insert several times into the same table, and I need to
remember the currval()s for another INSERT.

Are there any variables or some other state that I could abuse to safe the
values?
I already tried to CREATE TEMP TABLE only for inserting the values there, but
that doesn't seem to be allowed inside RULEs.
If there is no other

pseudocode:

CREATE TABLE bar (id_bar SERIAL PRIMARY KEY, bar int);
CREATE TABLE bar_bar (id1_bar int, id2_bar int);
CREATE VIEW
  foo
AS
  SELECT
    bar1.bar AS bar1,
    bar2.bar AS bar2
  FROM
    bar_bar,
    bar bar1,
    bar bar2
  WHERE
    bar_bar.id1_bar=bar1.id_bar AND
    bar_bar.id2_bar=bar2.id_bar;

CREATE RULE
    foo_ins
AS ON INSERT TO
    foo
DO INSTEAD (
  INSERT INTO bar (bar) VALUES (NEW.bar1);
  INSERT INTO bar (bar) VALUES (NEW.bar2);
  INSERT INTO bar_bar (id1_bar, id2_bar) VALUES (
    currval_of_1st_insert('public.bar_id_bar_seq'::text),
    currval_of_2nd_insert('public.bar_id_bar_seq'::text)
  )
);

TIA
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