The best replacement for had is have.

The best alternatives to had are rated as following:
★★★★★  have
★★★★  has
★★★  had had
★★  would have
★★  have grammar
★★  i have
★★  did
★  has grammar
★  had been
★  had
★  was
★  we have
★  have been
★  have had
★  got
  would
  ccd
  exview
  were
  past tense
  having
  if
  you have
  i have had
  i had
  he has

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Speaking about had, one probably shouldn't forget about past tense.

Other search terms related to had and their ratings are:
★★★★★ past tense
★★★ past participle
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